Tool for slotting a well-casing.



F. 0. MACKEY.

TOOL FOR SLOTTING A WELL CASING.

APPLICATION FILED MAR. 26. 915.

1 1 89,984. i Patented July 4, 1916;

2 SHEETS-SHEET l. 'fimgn-ucu-fot W wil'ncwao V i I I V r I 7 dlloznc'q 2 v V F. O. MACKEY.

TOOL FOR SLOTTING A WELL CASING.

APPLICATION FILED MAR-26.19M-

Patented July 4, 1916.

2 SHEETS-SHEET 2.

Q VHM cooeo s'rA'rns PATENT omen.

I 'mmxnm'o. mcxnx, or 'rooson nnrzonn.

' mooniron snor'rme 'A' WE L-casino.

' Application fled 1m]. as, 1915. Serial m. 17,216.

: scription'of the invention, suchz'as will enable others skilled in the art to which it appertains to make. and use the same.

This invention relates to new and useful improvements in tools for slotting well casings, and has for its principal object to pro vide a device which will out two or more slots in a; well casin simultaneously.

Another object o the invention is to provide a device which may be let in through the well casingfrom the upper end to the proper .distance withinthe casing and set .in o eration from the outside of the well.

With these and other objects in view, the invention consists in the novel combination and arrangement of parts which will be fully set forth inthe following specification and accompanying drawings, in which,

Figure 118 a sectional view of a well casin and tool constructed in accordance with th1s invention, showing the same as it would appear when entering the well casing, Fig. 2 1s a view similar to Fig. 1 showing the device as it would appear after having cut the slots in the casing, Fig. 3 is a sectional view taken on. line 3-3 of Fig. 2, Fig. 4: is a view in elevation of the guide blocks for the cutting rollers, Fig. 5 is a detail perspective view of one of the blocks carrying t e cutting rollers, and Fig. 6 is a side view in elevation of the wedge member "which controls the operation of the cutting) rollers.

Referring now to the drawings y characters of reference, the numeral 1 designates the well casing in which the tubular member 2 is slidable. This tubular membe'r2 is-inblock comprises the cylindrical body porturned at eachend as at 3 and carries intermediate of its ends the guide block 4 which is best illustrated in Fig. 4. This guide tion 5 having the tapered central aperture 6 formed therein. This aperture extends axially with relation to the cylindrical body and has communicating therewith the transverse slots '7 in which the'blocks carrying theicuttin rollers are slidable.

These b ocks, referred to in the above paragraph, are designated generally by the A specification of Lette'rsfatent.

Patented July 4, 1916.

numeral 8, and are best illustrated in Fig. 5, and each of said blocks comprises the body i) hav ng formed therein an end recess 10 in which the cutting wheel 11 ismounted to rotate on the pin 12. This cutting wheel 11 1s provided with a suitable cutting edge 13 as clearly shown in the'drawings. The body 9 is provided on the side opposite the recessed side, with the beveled face 14, which is arran ed to engage the tapering wedge member, w ichwill be more fully hereinafter described. A groove 15 is formed near the face 14 and extends parallel therewith and said groove is arranged to cotiperate' with the wed e member hereinbefore referred to in holding the device in pro er position. A

similar groove 16 is forme on the opposite side of the body-9 and also extends parallel with the face 14 as illustrated in the drawmgs.

The Wedge member, hereinbefore referred to, 1s designated generall by the numeral 17 and comprises-the cone-s aped body 18 hav in formed at its enlarged end the enlarge cy ndrical portion19, the opposite end of which terminates in the'cone-shaped portion.

20, having formed at its reduced end the cylindrical extension 21,,which is provided with the cylindrical enlargement 22 which in turn carries the threaded cylindrical portion 23, to which theljar or other driving device is threaded. 1 7 7 The body 18, here' before referred to, is provided with the longitudinal grooves 24 which are enlarged at their inner terminals as illustrated in Fig. 3 to receive the flanges formed by the grooves 15 and 16 on the rollencarryingmembers 8. These grooves 24 are provided with the enlarged opening,

25 at their lower terminals by which the blocks 8 carrying the cutting wheels 11,

ma be put in place or removed from the we ge member 17. A cylindrical extension 26 is formed at the reduced end of the body of the wedge member and said extension is provided with the slot27, through which the pin 28 extends. This in 28 is provided with a suitablecotter pm 29 for retaining the same in place and formsa sup ort for the disk 30, which forms the lower a 'utment for the device, a ainst which the member 4 rests, when the evice is being put in place or removed from the well casing.

In order to'hold th device in place in'the well casing, there is provi the prose;

'the'extension 31, which 15 riveted or otherwise secured as at 32 to the tubular member 2, and said extension terminates at its upper end in the connection 33 for the rope or other flexible member 34.

In operation a suitable set of jars or similar driving devices are secured to the end 23 of the member 17 and the flexible member 34 is also attached to the member 31, and the whole lowered into the well casing by means of the rope or cable attached to the jars. Simultaneously with the lowering of the well slottin'g device, the cable or rope 34: is also lowered and upon arriving at the desired point in the well casin the flexible member 34 is made fast, there y suspending the device against movement. The jars are then set in operation and it will be evident that the driving action thereof will force the member 19 against the member 4, thus causing the cutter wheels to perforate the well casing. In order to slot the casing, the

merit withthe well casin ,lirst flexible member 3% is released and the driving of the jars continued until slots of the desired length have been made. The device is then raised by exerting pull on the rope or cable which is attached to the jars, and it will be evidentthat the cutting wheels will be drawn inwardly and out of engagedue to the action of the grooves in the mem er 1'? cotiperating with the flanges on the i'nenriber 9. In this way it will beseen that the wheels will be flush with the face of the member 4 and permit the device to be easily raised to the desired point. Should it be desired to repeat cutting action on the part above the slots made, it is evident that the member 34 is a gain made fast and the slotting operation is a P While in the foregoing there has been shown and described the preferred embodi= ment of this invention, it is to be understood that such changes may be made in the combination and arrangement of parts as will fall within the spirit and scope of the invention as defined in the appended claims.

Having thus described my invention, I claim: I

1. A device of the class described comprising a tubular member, a cylindrical member secured within the tubular member and provided with a central vertical tapering aperture, and transversely extending slots communicating with each other, cutterwheel carrying blocks slidable in said slots, a wedge member slidable through the central aperture in said cylindrical member, and means carried by said tubular member to hold the device in operative position within the well casing, said means also adapted to be used to remove the device from the well casing.

2. A device of the class described comprising a tubular member, a cylindrical member secured within the tubular member and provided with,a central vertical ta ering aperture and transversely exten ing slots communicatin with said aperture,

cutter-wheels carrymg blocks slidabl e in said slots, a wedge member slidable through the central aperture, a cylindrical extension formed at the lower end of the wedge memher, and a disk secured to said extension forming a lower abutment for the device when it is being put in place or removed from the well casing.

In testimony whereof I aflix my signature in presence-of two witnesses.

' FRANIN O. MACKEY. Witnesses:

Cns Brennan, Hazm. K 51:1 main, 

